ACER Nitro 5 AN515-55-774Z ((FH52M LA-J891P REV.1) - GPU memory short circuit

[konter]

Hello,
ACER Nitro 5 AN515-55-774Z ((FH52M LA-J891P REV.1)
Intel Core i7-10750H
RTX 2060 6GB GDDR6
Turned off during normal operation and never turned on again.
After disassembling and connecting to the power supply PLW3 burned out.

Resistances on all chokes are within normal limits except PLW1 and PLW2 (about 0.5 ohms) - powering the video memory.
I am new to repair( Advise what to do next to find the short circuit and fix it.
Or if burned GPU then how to disconnect GPU and use without it.
If there is anything else that needs to be measured, please tell me about it.
Thanks .

I am attaching the boardview and schematic.

[MOD EDIT] Link to Schematic & Boardview -> https://www.badcaps.net/forum/troubl...atic-boardview

[mr_rk]

I have the same problem! How did you decide?

[Sephir0th]

If you're lucky, it is enough to simply removed the internal shorted High-Side Mosfet and all related inductors. You likely need to disable the dGPU afterwards at least in Windows.

[mr_rk]

My laptop runs on Intel UHD. But PTX2060 doesn't work. Later I discovered a burnt PLW3. What is the probability that after replacing PLW3 the video card will work? P.S. I don't know much about laptops, please help me.

[mnciks11]

Hello guys

Just a quick one, i have the exactly the same machine, came to me with no power, there was a short on the 19v power line, traced the short where it was coming from, the double mosfet supplying the GPU main line, i believe the GPU MEMORIES since they were all getting very warm while i was injecting the power on the 19v power line and the GPU MEMORIES were getting very warm all of them then n\boom i found the shorted double mosfet feeding the GPU MEMORIES shorted, after replacing it, the short was gone from the 19v and the machine turned on, booted but does not detect the GPU on the desktop, using the intel graphics....Tried the drivers but its doesn't detect the GPU at all....I am thinking of changing the GPU memories one by one since were getting very warm before....I'm lost guys, what is your view on this one

[alfredposadas09]

Hello guys

Just a quick one, i have the exactly the same machine, came to me with no power, there was a short on the 19v power line, traced the short where it was coming from, the double mosfet supplying the GPU main line, i believe the GPU MEMORIES since they were all getting very warm while i was injecting the power on the 19v power line and the GPU MEMORIES were getting very warm all of them then n\boom i found the shorted double mosfet feeding the GPU MEMORIES shorted, after replacing it, the short was gone from the 19v and the machine turned on, booted but does not detect the GPU on the desktop, using the intel graphics....Tried the drivers but its doesn't detect the GPU at all....I am thinking of changing the GPU memories one by one since were getting very warm before....I'm lost guys, what is your view on this one

this is a FH52M LA-J891P REV.1 section

[konter]

Alfredposadas09,
Hello,
I think first of all you should check 1.8 - power supply to GPU mem. If there is no short circuit, then try to check through MATS, for example test on 20 mb memory If there will be many errors on all memory channels, then GPU is dead.